Portable off-axis illumination automatic focusing fundus imaging device

Abstract

The invention discloses a portable off-axis illumination automatic focusing fundus imaging device which comprises an imaging system, a fixation lamp system, an illumination system, an automatic focusing system, an astigmatism elimination system, a main control system and a display system. The imaging system comprises an ocular lens, an imaging lens group, an infrared cut-off assembly and an imagesensor. The fixation lamp system comprises a fixation lamp set and a light splitting assembly, wherein fixation lamp set is imaged on the fundus through the light splitting assembly to provide a fixation point. Light emitted by the lighting system illuminates the fundus through the eyepiece, fundus reflected light is imaged on the image sensor through the eyepiece, the imaging lens set and the infrared cut-off assembly, the main control system displays fundus images collected by the image sensor on the display system, and the astigmatism eliminating system can eliminate stray light in the fundus reflected light. According to the invention, collection of the fundus image is realized, manual focusing operation is not needed, automatic focusing is realized, stray light and infrared interference light can be removed, and the definition of the image is improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a portable off-axis illumination autofocus fundus imaging device. Background technique [0002] At present, portable fundus imaging devices on the market usually use manual focus to perform focus operations. Through repeated manual focus operations, the focus sharpness is judged subjectively, which is inefficient and prone to misjudgment, and deviations in taking photos , and there is a chromatic aberration between the observation light and the imaging light, which cannot be compensated manually, stray light cannot be effectively removed, and there is also interference from infrared light, which eventually leads to unclear imaging. Contents of the invention [0003] The invention overcomes the shortcomings of the prior art and provides a portable off-axis illumination autofocus fundus imaging device to solve the problems in the prior art. [0004] In order to achieve t...

AI Technical Summary

Problems solved by technology

[0002] At present, portable fundus imaging devices on the market usually use manual focus to perform focus operations. Through repeated manual focus operations, the focus sharpness is judged subjectively, which is inefficient and prone to misjudgment, and deviations in taking photos , and there is a chromatic aberration between the observation light and the imaging light, which cannot be compensated manually, stray light cannot be effectively removed, and there is also interference from infrared light, which eventually leads to unclear imaging

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